3-chloro-9-[2-(2-hydroxyethylamino)-ethylamino] acridine and method for its production



Patented Nov. 21, 1950' UNITED STATES PATENT OFFICE s cmzono- 9 -[2-( c- HYDROXYETHYL- AMINO) -ETHYLAMINO] ACRI-DIN-E-AND' em'rnoo For. ITS. PRODUCTION ration of Delaware No Drawing. Application January 22, 1949, Serial No. 72,267

NHOHzCHzNHOHzOHzOH can be prepared by various methods. However, the procedure preferred in practicing the invention involves heating a mixture of phenol and 3,9- dichloroacridine to form 3-chloro-9-phenoxyacridine hydrochloride (which need not be isolated) which is then heated with Z-(Z-hydroxyethylamino)ethylamine. While the foregoing procedure is preferred in practicing my invention, other methods of preparing said basic acridine compound are operable. chloroacridine can be heated directly with 2-(2- hydroxyethylamino)ethylamine without first reacting the former with phenol. In addition, the basic side chain can be attached stepwise to the acridine nucleus. In such a process, 3,9-dichloroacridine or Z-chloro 9 phenoxyacridine hydrochloride is heated with 2-hydroxyethylamine to give S-chloro-E-)- 2-hydroxyethylamino) acridine, is then treated with a halogenating agent such as thionyl chloride to yield 3chloro-9- (Z-chloroethylamino) acridine, which, in turn, is treated with Z-hydroxyethylamine to give the desired basic acridine compound, 3- chloro-9 (2 (2 hydroxyethylamino)ethylamino) acridine.

The salts of the instant invention are prepared by treating the foregoing described basic acridine compound with the appropriate acid. In practicing my invention 1 found it convenient to employ the dihydrochloride salt. However, other salts are within the scope of the invention. Included among other salts which may be employed are the following, formed by reacting the base with the appropriate relatively non-toxic inorganic or organic acid: the dihydrobromide, di-

For example, 3,9-diphosphate, disulfate, disulfamate, diethanesulfonate, ditartrate, dicitrate, disuccinate, diacetate, dibenzoate, dioleate, and the like.

The following example will further illustrate a specific embodiment of my invention.

3 chloro 9 (2 (2 hydromyethylaminmethylamz'nomcridine dihydrochZoride.A stirred mixture of 75 g. of phenol and 12.4 g. of 3,9-dichloroacridine was heated on the steam bath for about 15 minutes and 6.5 g. of 2-(2-hydroxyethylamino) ethylamine was added. After heating for about 2 hours on the steam bath the slightly cooled reaction mixture was poured into a stirred solution of 12.5 cc. of cone. hydrochloric acid in 200 cc. of acetone. After about 1 hour the product was filtered oif, washed with acetone and then freed from most of the adhering phenol by stirring in hot acetone and filtering the mixture While hot. The resulting solid was recrystallized twice from ethanol containing some water and dried for 2 hours at C. for about 48 hours in a vacuum desiccator, yielding about 11.5 g. of the desired product, 3-ch1oro-9-(2-(2-hydroxyethylamino)ethylamino) acridine dihydrochloride monohydrate, M. P. 201-203 C.

I claim:

1. A compound selected from the group consisting of 3-chloro-9-(Z-(Z-hydroxyethylamino) ethylamino)acridine having the formula NHCHzCHzNHOHzCHzOH and acid addition salts thereof.

2. 3-chloro-9- (2- (Z-hydroxyethylamino) ethylamino) acridine dihydrochloride having the formula 3. In the process of preparing 3-cnlcro-9-(2- (Z-hydroxyethylamino) ethylamino) acridine having the formula 3 4 the step which comprises heating a member of OTHER REFERENCES the group consisting of 3,9-dich1oroacridine and Chem Abst v01 37 a 240 (1943 (Cit. 3-ch10ro-9-phenoxyacridine hydrochloride with Pm SW fig g 52 31% 2-(2-hydroxyethylamino)ethylamine.

ALEXANDER SURREY 5 Mosher Antimalarials: Natural and synthetic REFERENCES CITED (Edwards Bros., Ann Arbor, M1ch., 1942) page 69.

Shriner et aL, Synthetic Antimalarials (pub- The following references are of record in the lished in Bloomington, Indiana, 1941), page 30.

file of this patent:

UNITED STATES PATENTS 10 Number Name Date 2,113,357 Mietzsch Apr. 5, 1938 

1. A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 3-CHLORO-9-(2-(2-HYDROXYETHYLAMINO) ETHYLAMINO) ACRIDINE HAVING THE FORMULA 